Facilitating copyfraud could invalidate their DMCA protections. Since they choose to provide monetary compensation based on accusations instead of evidence with a system they created, they would also be responsible for the system that they created facilitating said copyfraud that is knowingly taking money from legitimate copyright holders and giving it to false claimants. If any other publisher were to give money owed to a creator, say a book creator, this would be obvious fraud, as it is in this case. I think the case is stronger against YouTube than it will would initially appear.